Question

i have to select the common coloumns c1 ,c2,c3 from result of two sql satements.

1)

select c1, c2, c3,count(c3)  from (select * from form_name
where data_created >'1273446000' and data_creazione<'1274569200')
group by c1,c2, c3 having count(c3)>1

2)

select c1, c2, c3,count(c3)  from (select * from form_name 
where data_created>'1272236400' and data_creazione<'1274569200')
group by c1,c2, c3 having count(c3)>2

I need to select c1,c2,c3 all same and common found in both the result of query.

how could this be done…could anyone help please?

Answer 1

remove the count(c3) from the select list, it can differ (the HAVING clause guarantees this) and the OP only wants to compare c1, c2 and c3. If the COUNT(c3) column is different, what rows can be in common? none or some, it will vary. Also remove the derived tables, they are not necessary. So try:

select 
    c1, c2, c3  
    from form_name
    where data_created >'1273446000' and data_creazione<'1274569200'
    group by c1,c2, c3 
    having count(c3)>1
INTERSECT
select 
    c1, c2, c3
    from form_name 
    where data_created>'1272236400' and data_creazione<'1274569200'
    group by c1,c2, c3 
    having count(c3)>2